In linux what command sequence do we enter to stop a program?

exit command is used to stop the program.

Explanation:

exit command is used to exit the shell when it is currently running.It can take one or more arguments exit[n] and exits the shell and returns the status of n.

exit with parameters

exit [n] exits the shell and returns the status of n.

exit without parameters

exit exits the shell and returns the status of last command that is executed.